#3137AB#3137AB

#3137AB is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.3% C 0.181 H 273.0°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#3137AB
RGB	rgb(49, 55, 171)
HSL	hsl(237, 55%, 43%)
HSV	hsv(237, 71%, 67%)
CMYK	cmyk(71.3%, 67.8%, 0%, 32.9%)
CIE-LAB	lab(30.22, 36.68, -62.61)
CIE-LCH	lch(30.22, 72.57, 300.36°)
OKLab	oklab(41.35% 0.0095 -0.181)
OKLCH	oklch(41.35% 0.181 273)
XYZ	xyz(9.9810, 6.3246, 39.2150)
Luminance	0.0633 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3137AB #ABA531

analogous

#3174AB #3137AB #6831AB

triadic

#3137AB #AB3137 #37AB31

tetradic

#3137AB #AB3174 #ABA531 #31AB68

square

#3137AB #AB3174 #ABA531 #31AB68

split-complementary

#3137AB #AB6831 #74AB31

monochromatic

#16184C #23287B #3137AB #4D53CC #7D81DA

Accessibility & contrast

On white

9.27

#3137AB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.27

#3137AB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3137AB

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3137AB	#FFFFFF	#000000	##FFFFFF
##3137AB	1.00	9.27	2.27	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.27	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DAF

Deuteranopia (green-blind)

#0041A9

Tritanopia (blue-blind)

#00566C

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #3137ab;
/* rgb */ color: rgb(49, 55, 171);
/* oklch */ color: oklch(41.3% 0.181 273.0);

Tailwind

colors: {
  custom: {
    50: '#7b6ec5',
    500: '#3137ab',
    950: '#000000',
  },
}

SCSS

$custom: #3137ab;
$custom-light: #7b6ec5;
$custom-dark: #000000;

JSON

{
  "hex": "#3137ab",
  "rgb": {
    "r": 49,
    "g": 55,
    "b": 171
  },
  "hsl": {
    "h": 237.049,
    "s": 55.455,
    "l": 43.137
  },
  "oklch": {
    "l": 0.4135,
    "c": 0.18121,
    "h": 273
  },
  "luminance": 0.06326
}

Semantic roles & 50–950 ramp

primary

#3137AB

secondary

#C2BF75

accent

#D749DF

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0B0713

muted

#7C7A82

Preview Lab

Preview with #3137AB

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →